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'82 750f Jet terminology, sizes and missing parts

bjbrenden

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Flagstaff, AZ
I just picked up a 1982 cb750f that has more than one problem. I'll start with the carbs.

Underneath the black plug is a #35, which I believe to be the "slow jet", is that correct terminology?
*also, on carb #4 there was nothing under the plug, no jet.

The longer "hex" head jet is a #75. I don't know how to refer to this piece since I can't figure out what the hell it is.

Finally, what I believe to be the "main jet" is a #68 with a longer "needle" (no number on it) screwed in beneath it.

Stock this bike comes with a 102 main, 68 secondary and 35 slow jet. Can anyone provide a basic diagram for replacing the jets or give me any advice?
I've been looking everywhere and am getting more confused than anything. Thank you,

photo (1).jpgphoto (2).jpg
 
Haynes book for cb750/900, just looking at it today, trying to decide if I should rebuild mine or get flatslides.
 
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